Pressure relief tee valve

Abstract

The utility model discloses a kind of pressure relief type tee reversing valves, including tee valve body, the tee valve body ontology is equipped with feed straight pass, discharge straight pass and discharge side pass, the valve core that can be driven rotation is equipped in the tee valve body inner chamber, the valve core has two limit positions in tee valve body, respectively, straight pass and side pass, when valve core is in straight pass, feed straight pass and discharge straight pass are communicated, and block feed straight pass and discharge side pass from communicating, when valve core is in side pass, feed straight pass and discharge side pass are communicated, and block feed straight pass and discharge straight pass from communicating;Adjacent discharge side pass is equipped with exhaust passage on the tee valve body, and the exhaust passage is communicated with discharge straight pass when valve core is in side pass.The utility model is improved by tee valve body structure, can not need to install exhaust device on the top of silo to carry out pressure relief.

Description

Technical Field

[0001] This utility model relates to the field of pneumatic conveying pipeline switching technology, specifically a pressure-relief three-way reversing valve. Background Technology

[0002] When used in pneumatic conveying systems, three-way directional valves change the direction of material flow by switching the valve core. For example, the three-way directional valve disclosed in patent application CN202121637694.1, when injecting material into a closed silo, causes the compressed gas conveying the material to enter the silo along with it, resulting in high pressure inside the silo. To relieve this pressure, an exhaust device is usually installed at the top of the silo, but this increases equipment costs. Utility Model Content

[0003] To reduce equipment costs, this application provides a pressure-relief three-way directional valve. By improving the structure of the three-way valve body, it is not necessary to install an exhaust device on the top of the silo for pressure relief, thereby solving the above-mentioned technical problems.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: A pressure-relief three-way directional valve includes a three-way valve body. The three-way valve body has a feed straight-through, a discharge straight-through, and a discharge side passage. The valve core is rotatable in the inner cavity of the three-way valve body. The valve core has two extreme positions in the three-way valve body, namely the straight-through position and the side-through position. When the valve core is in the straight-through position, the feed straight-through and the discharge straight-through are connected, and the connection between the feed straight-through and the discharge side passage is blocked. When the valve core is in the side-through position, the feed straight-through and the discharge side passage are connected, and the connection between the feed straight-through and the discharge straight-through is blocked. The three-way valve body is provided with an exhaust channel adjacent to the discharge side passage. When the valve core is in the side passage position, the exhaust channel is connected to the discharge straight passage.

[0005] As a further description of the above technical solution: the valve core includes two sets of circular side plates, a guide plate, and a reinforcing plate. The guide plate and the reinforcing plate are both disposed between the two sets of circular side plates. The outer radius of the guide plate away from the guide plate is equal to the outer radius of the arc of the circular side plate. The guide plate switches with the rotation of the valve core to change the discharge flow direction of the three-way valve body. The opposite sides of the two sets of circular side plates are symmetrically provided with end shafts. A sealing ring is embedded on the outer ring of both sets of circular side plates. A sealing strip is embedded on the two side ridges of the guide plate.

[0006] As a further description of the above technical solution: the three-way valve body is detachably connected to a drive end valve cover and a maintenance end valve cover. The end shafts on both ends of the valve core respectively concentrically pass through the central holes of the drive end valve cover and the maintenance end valve cover. Each of the two sets of central holes is provided with an outer ring connected to its hole wall and a sliding bearing sleeved on the valve core end shaft. The central holes of the drive end valve cover and the maintenance end valve cover are also provided with an oil seal and a large snap ring. The oil seal is fixed at the central hole by the large snap ring and the snap ring groove on the inner wall of the central hole, and fits against the end of the sliding bearing. The valve core end shaft adjacent to the maintenance end valve cover is provided with a limiting ring and a small snap ring located outside the maintenance end valve cover. The limiting ring is fixed on the end shaft by the snap ring and the snap ring groove on the end shaft, and is in contact with the outer wall of the maintenance end valve cover.

[0007] As a further description of the above technical solution: a first O-ring is provided between the drive end valve cover, the maintenance end valve cover and the three-way valve body.

[0008] As a further description of the above technical solution: the end shaft passing through the central hole of the drive end valve cover is connected to a rotary drive device that drives the valve core to rotate.

[0009] As a further description of the above technical solution: a second O-ring is fitted on the end shafts at both ends of the valve core, which respectively seals with the valve cover at the drive end and the valve cover at the maintenance end.

[0010] The beneficial effects of this utility model are: This utility model provides a pressure-relief three-way reversing valve. When the valve core is in the side-port position, the feed straight-through and discharge side-port are connected, and the exhaust channel is also connected to the discharge straight-through. Before filling the silo, this valve is installed on the feed end of the silo. Specifically, the discharge side-port and exhaust channel on the three-way valve body are connected to the feed end of the silo. The material is conveyed by compressed gas, entering the three-way valve body through the feed straight-through and then into the silo through the discharge side-port. The compressed gas also enters the silo along with the material. Since the exhaust channel is connected to the feed end of the silo and communicates with the discharge straight-through, the compressed gas enters the silo directly through the exhaust channel into the three-way valve body and then exits through the discharge straight-through, thus achieving pressure relief of the silo. Through the improvement of the three-way valve body structure, pressure relief can be performed simultaneously while filling the silo, eliminating the need for an exhaust device on the top of the silo and saving equipment costs. Attached Figure Description

[0011] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0012] Figure 1 This is a schematic diagram of the split structure of this utility model.

[0013] Figure 2 This is a schematic diagram showing the state of the valve core in the three-way valve body when it is in the straight-through position.

[0014] Figure 3 This is a schematic diagram showing the state of the valve core in the three-way valve body when it is in the side-through position.

[0015] In the diagram: 1. Three-way valve body; 101. Feed straight passage; 102. Discharge straight passage; 103. Discharge side passage; 104. Exhaust passage; 2. Valve core; 201. Circular side plate; 202. Guide plate; 203. Reinforcing plate; 204. End shaft; 3. Sealing ring; 4. Sealing strip; 5. Drive end valve cover; 6. Maintenance end valve cover; 7. Sliding bearing; 8. Oil seal; 9. Large snap ring; 10. Limiting ring; 11. Small snap ring; 12. First O-ring; 13. Second O-ring. Detailed Implementation

[0016] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0017] like Figure 1 As shown, this utility model provides a pressure-relief three-way reversing valve, including a three-way valve body 1. The three-way valve body 1 is provided with a feed straight passage 101, a discharge straight passage 102, and a discharge side passage 103. The inner cavity of the three-way valve body 1 is provided with a rotatable valve core 2. The valve core 2 has two extreme positions in the three-way valve body 1, namely the straight passage position and the side passage position. When the valve core 2 is in the straight passage position, the feed straight passage 101 and the discharge straight passage 102 are connected, and the connection between the feed straight passage 101 and the discharge side passage 103 is blocked. When the valve core 2 is in the side passage position, the feed straight passage 101 and the discharge side passage 103 are connected, and the connection between the feed straight passage 101 and the discharge straight passage 102 is blocked. The three-way valve body 1 is provided with an exhaust channel 104 adjacent to the discharge side passage 103. When the valve core 2 is in the side passage position, the exhaust channel 104 is connected to the discharge straight passage 102.

[0018] Therefore, when the valve core 2 is in the side-through position, the feed straight passage 101 is connected to the discharge side passage 103, and the exhaust passage 104 is connected to the discharge straight passage 102. Before filling the silo, this application is installed on the feed end of the silo. Specifically, the discharge side passage 103 and the exhaust passage 104 on the three-way valve body 1 are connected to the feed end of the silo. After the material is transported by compressed gas, it enters the interior of the three-way valve body 1 through the feed straight passage 101 and then enters the silo through the discharge side passage 103. The compressed gas also enters the silo together. Since the exhaust passage 104 is connected to the feed end of the silo and is connected to the discharge straight passage 102, the compressed gas will directly enter the interior of the three-way valve body 1 through the exhaust passage 104 after entering the silo, and then be discharged from the discharge straight passage 102, thereby realizing the depressurization of the silo. By improving the structure of the three-way valve body 1, pressure can be released simultaneously while the silo is being filled with material, eliminating the need to install an exhaust device on the top of the silo for pressure release, thus saving equipment costs.

[0019] In this embodiment, the specific structure of the valve core 2 includes two sets of circular side plates 201, a guide plate 202, and a reinforcing plate 203. The guide plate 202 and the reinforcing plate 203 are both disposed between the two sets of circular side plates 201. The outer side of the guide plate 202 away from the guide plate 202 has the same radius as the outer arc of the circular side plate 201. The guide plate 202 switches with the rotation of the valve core 2 to change the discharge flow direction of the three-way valve body 1 and connects with the internal channel of the three-way valve body 1 without any dead angle. The two sets of circular side plates 201 are symmetrically provided with end shafts 204 on opposite sides. A sealing ring 3 is embedded on the outer ring of both sets of circular side plates 201. A sealing strip 4 is embedded on the two side ridges of the guide plate 202.

[0020] like Figure 2 As shown, at this time, the valve core 2 is in the straight-through position inside the three-way valve body 1, the feed straight passage 101 and the discharge straight passage 102 are connected to form a material straight channel, and the guide plate 202 of the valve core 2 blocks the feed straight passage 101 from being connected to the discharge side passage 103.

[0021] like Figure 3 As shown, at this time, the valve core 2 is in the side passage position inside the three-way valve body 1, the feed straight passage 101 is connected to the discharge side passage 103, and the guide plate 202 of the valve core 2 blocks the feed straight passage 101 from being connected to the discharge straight passage 102. In addition, the discharge straight passage 102 is connected to the exhaust channel 104.

[0022] Continue to refer to Figure 1 In this embodiment, the three-way valve body 1 is detachably connected to a drive end valve cover 5 and a maintenance end valve cover 6. The end shafts 204 on both ends of the valve core 2 respectively concentrically pass through the center holes of the drive end valve cover 5 and the maintenance end valve cover 6. Each of the two sets of center holes is provided with an outer ring connected to its hole wall and sleeved on the end shafts 204 of the valve core 2. An oil seal 8 and a large snap ring 9 are provided at the center holes of the drive end valve cover 5 and the maintenance end valve cover 6. The oil seal 8 is fixed at the center hole by the snap ring 9 cooperating with the snap ring groove on the inner wall of the center hole and is attached to the end of the sliding bearing 7. A limiting ring 10 and a small snap ring 11 are provided on the valve core 2 end shaft 204 adjacent to the maintenance end valve cover 6. The limiting ring 10 is fixed on the end shaft 204 by the snap ring 11 cooperating with the snap ring groove on the end shaft 204 and is attached to the outer wall of the maintenance end valve cover 6. A first O-ring 12 is provided between the drive end valve cover 5, the maintenance end valve cover 6, and the three-way valve body 1 to improve sealing. An end shaft 204, passing through the central hole of the drive end valve cover 5, is connected to a rotary drive device that drives the valve core 2. Second O-rings 13 are fitted on the end shafts 204 at both ends of the valve core 2, respectively sealingly engaging with the drive end valve cover 5 and the maintenance end valve cover 6 to further improve sealing. Due to the connection method between the valve core 2 and the drive end valve cover 5 and the maintenance end valve cover 6, the valve core 2 can be directly removed from the three-way valve body 1 by disassembling the maintenance end valve cover 6, making maintenance extremely convenient.

[0023] The embodiments of the present invention described above do not constitute a limitation on the scope of protection of the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A pressure-relief three-way directional valve, comprising a three-way valve body (1), wherein the three-way valve body (1) is provided with a feed straight passage (101), a discharge straight passage (102) and a discharge side passage (103), wherein a rotatable valve core (2) is provided in the inner cavity of the three-way valve body (1), wherein the valve core (2) has two extreme positions in the three-way valve body (1), namely a straight passage position and a side passage position, wherein when the valve core (2) is in the straight passage position, the feed straight passage (101) is connected to the discharge straight passage (102) and the feed straight passage (101) is blocked from being connected to the discharge side passage (103), wherein when the valve core (2) is in the side passage position, the feed straight passage (101) is connected to the discharge side passage (103) and the feed straight passage (101) is blocked from being connected to the discharge straight passage (102), characterized in that: The three-way valve body (1) is provided with an exhaust channel (104) adjacent to the discharge side passage (103). The exhaust channel (104) is connected to the discharge straight passage (102) when the valve core (2) is in the side passage position.

2. The pressure-relief three-way directional valve according to claim 1, characterized in that... The valve core (2) includes two sets of circular side plates (201), a guide plate (202), and a reinforcing plate (203). The guide plate (202) and the reinforcing plate (203) are both arranged between the two sets of circular side plates (201). The outer side of the guide plate (202) away from the guide plate (202) has the same radius as the outer arc of the circular side plate (201). The guide plate (202) switches with the rotation of the valve core (2) to change the discharge flow direction of the three-way valve body (1). The two sets of circular side plates (201) are symmetrically provided with end shafts (204) on opposite sides. The outer rings of the two sets of circular side plates (201) are inlaid with sealing rings (3). The two sides of the guide plate (202) are inlaid with sealing strips (4).

3. The pressure-relief three-way directional valve according to claim 2, characterized in that... The three-way valve body (1) is detachably connected to a drive end valve cover (5) and a maintenance end valve cover (6). The end shafts (204) on both ends of the valve core (2) are concentrically connected to the center holes of the drive end valve cover (5) and the maintenance end valve cover (6). Each of the two sets of center holes is provided with an outer ring connected to the hole wall and a sliding bearing (7) sleeved on the end shaft (204) of the valve core (2). The drive end valve cover (5) and the maintenance end valve cover (6) are also provided with an oil seal (8) and a large snap ring (9) at the center hole. The oil seal (8) is fixed at the center hole by the snap ring (9) and the snap ring groove at the inner wall of the center hole, and is attached to the end of the sliding bearing (7). The valve core (2) end shaft (204) adjacent to the maintenance end valve cover (6) is provided with a limiting ring (10) and a small snap ring (11) located outside the maintenance end valve cover (6). The limiting ring (10) is limited to the end shaft (204) by the small snap ring (11) cooperating with the snap ring groove on the end shaft (204) and is in contact with the outer wall of the maintenance end valve cover (6).

4. The pressure-relief three-way directional valve according to claim 3, characterized in that... A first O-ring (12) is provided between the drive end valve cover (5), the maintenance end valve cover (6) and the three-way valve body (1).

5. The pressure-relief three-way directional valve according to claim 3, characterized in that... The end shaft (204) that passes through the center hole of the drive end valve cover (5) is connected to the rotary drive device that drives the valve core (2) to rotate.

6. The pressure-relief three-way directional valve according to claim 3, characterized in that... The valve core (2) has a second O-ring (13) on each end shaft (204) on both ends, which is respectively sealed to the drive end valve cover (5) and the maintenance end valve cover (6).

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